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源代码/StgSharp/Geometries/PlainGeometry/IPlainGeometry.cs

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+using StgSharp.Math;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StgSharp.Geometries
+{
+
+    /// <summary>
+    /// 平面几何体。包含三角形，对称四边形，自由多边形等。最多可由16个点参数定义。
+    /// </summary>
+    public abstract class IPlainGeometry:INode<IPlainGeometry>
+    {
+        protected readonly uint bornTick;
+        internal readonly Point refOrigin;
+
+        public Point RefOrigin { get { return refOrigin; } }
+        public abstract Point RefPoint01{ get; }
+        public abstract Point RefPoint02{ get; }
+        public abstract Point RefPoint03{ get; }
+        public uint BornTime => bornTick;
+
+        public IPlainGeometry(uint bornTime)
+        {
+            bornTick=bornTime;
+        }
+
+        public IPlainGeometry(Counter<uint> MainTimer)
+        {
+            bornTick = MainTimer.Value;
+        }
+
+        public IPlainGeometry() { }
+
+
+        internal abstract void OnRender(uint tick);
+
+        public abstract Line[] GetAllSides();
+
+        public abstract Plain GetPlain();
+
+    }
+
+
+}